In April 2017, the Chicago Board of Education adopted a common application for all high school choice programs, including charter schools, with one deadline and a single best offer. GoCPS, CPS's online hub for exploring and applying to high schools, launched in the fall of 2017. This report, co-authored by the University of Chicago Consortium on School Research and the Federal Reserve Bank of Chicago, analyzes the first year of GoCPS implementation for students who enrolled in ninth grade in the fall of 2018.